Physiology Over half of the potassium that appears in the urine of a patient, who has ingested some potassium salts, is derived from A Glomerular filtrate B Secretion by the distal tubule C Reabsorption in the proximal tubule D Secretion by the loop of Henle 💡 Explanation Over half of the potassium that appears in the urine of a patient, who has ingested some potassium salts, is derived from ✓ Correct Answer: B. Secretion by the distal tubule